LIFE IN OUTER SPACE

It is the Planet which surface temperatures allow liquid water.

• Earth

• Pluto

• Mars

• Jupiter

It is the closest planet to the sun. Its surface is too hot to allow liquid water.

• Earth

• Mercury

• Mars

• Jupiter

Its surface has the coldest temperatures of any planet in our solar system. Scientists believe life is even less likely to exist.

• Mercury

• Earth

• Saturn

• Pluto

It is the planet where possibilities of life exist. Which surface temperatures could allow liquid water. But no water has yet been found.

• Saturn

• Earth

• Mars

• Jupiter

The surface of (a)   is even hotter than Mercury's, so there is no liquid water exist.

(a)   is the largest planet in our solar system. It is also one of the brightest objects in the nighttime sky.

(a)   use models to study the stars, including models of how light behaves.

Sir (a)   invented the reflecting telescope in 1670.

Some group of stars are called what?

• Constellar

• Constellations

• Milkyway

• Galaxy

They come in many sizes and can be in different stages of their lives.

• Stars

• Moon

• Meteor

• Planets